Click scale symbol at the bottom of main page, select the second tab. You should see 3* exchange tab at the top.
I already exchanged so you won't see mine. However I don't know if there's any requirement for it to appeared or not. Like log in enough time in 14 days. (Usual period of FKG and GS events)
yeah, I don't have that in GS either
Not used to DMM yet
It hasn't been long since my other login bonus for beign a new playa and then some bloomer fetish Nazuna login bonus
Also, feeling some playas here who are naughty for trying to get into Nazuna's pants